Learn about some of the most common terms used at Peñoles and in the mining and metals industry.

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  • Ore grade

    Concentration of a desired mineral in a potentially mineable ore deposit. It is commonly expressed as a percentage (%), parts per million (ppm) or grams per ton (g/t). For example, a gold grade of 0.27 g/t indicates that for each ton of ore, it is possible to find 0.27 grams of this metal.

  • Ore vein

    Mineral material deposited in rock fissures, cracks or crevices, whose composition is different from the substance in which it is embedded.